MCQOPTIONS
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MCQOPTIONS
This section includes 2253 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________? |
| A. | Lumps |
| B. | Pellets |
| C. | Briquettes |
| D. | Sinter |
| Answer» C. Briquettes | |
| 402. |
Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of _______________ hardness? |
| A. | Scratch |
| B. | Indentation |
| C. | Dynamic |
| D. | Rebound |
| Answer» B. Indentation | |
| 403. |
Methyl orange indicator turns_____________________? |
| A. | Orange yellow in alkaline medium |
| B. | Orange yellow in acidic medium |
| C. | Colourless in acidic medium |
| D. | Colourless in basic medium |
| Answer» B. Orange yellow in acidic medium | |
| 404. |
Metalloids________________? |
| A. | Are good conductor of heat & electricity |
| B. | Act as electron donors with metals & as electron acceptor with non-metals |
| C. | Are not necessarily solids at room temperature |
| D. | Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron |
| Answer» E. | |
| 405. |
Metallic surveying tapes are made of _____________ which has a low co-efficient of expansion & enough strength ? |
| A. | Invar |
| B. | Hastelloy |
| C. | Duralumin |
| D. | Monel metal |
| Answer» B. Hastelloy | |
| 406. |
Metal shots used in shot blasting are made of ______________________? |
| A. | Stellite |
| B. | Steel |
| C. | Bronze |
| D. | Lead |
| Answer» C. Bronze | |
| 407. |
____________________ metal is used as a bearing liner material? |
| A. | Pewter |
| B. | White |
| C. | Babbitt |
| D. | Gun |
| Answer» D. Gun | |
| 408. |
Melting point & boiling points of liquid oxygen are respectively – 218.8°C & – 183°C, while the same for liquid nitrogen is – 210°C & – 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 ? |
| A. | °C |
| B. | °F |
| C. | °K |
| D. | °R |
| Answer» C. °K | |
| 409. |
Maximum permissible sulphur content in steel is ______________ percent ? |
| A. | 0.015 |
| B. | 0.055 |
| C. | 0.505 |
| D. | 0.805 |
| Answer» B. 0.055 | |
| 410. |
Maximum permissible air velocity in pipelines is about ______________ metre/second ? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 40 |
| Answer» C. 20 | |
| 411. |
Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is ________________ mm? |
| A. | 15 |
| B. | 25 |
| C. | 10 |
| D. | 30 |
| Answer» C. 10 | |
| 412. |
Maximum hardenability of steel depends upon its_______________________? |
| A. | Chemical composition |
| B. | Carbon content |
| C. | Grain size |
| D. | Alloying elements content |
| Answer» E. | |
| 413. |
Maximum consumption of limestone is in the ____________________ industry? |
| A. | Iron and steel |
| B. | Cement |
| C. | Glass |
| D. | Fertiliser |
| Answer» E. | |
| 414. |
Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel? |
| A. | 0.01 to 0.10 |
| B. | 0.2 to 0.4 |
| C. | 0.5 to 0.7 |
| D. | 0.8 to 1.0 |
| Answer» C. 0.5 to 0.7 | |
| 415. |
Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an ______________ body? |
| A. | Grey |
| B. | Black |
| C. | Opaque |
| D. | White |
| Answer» B. Black | |
| 416. |
Matte smelting is used in the extraction of_____________________? |
| A. | Lead |
| B. | Zinc |
| C. | Aluminium |
| D. | Copper |
| Answer» E. | |
| 417. |
Materials having resistivity ranging from 1 to 100 ohm. cm is termed as___________________? |
| A. | Conductor |
| B. | Insulator |
| C. | Semi-conductor |
| D. | None of these |
| Answer» D. None of these | |
| 418. |
Materials having ________________ lattice structure are usually the most ductile ? |
| A. | Body centred cubic (bcc) |
| B. | Hexagonal close packed (hcp) |
| C. | Face centred cubic (fcc) |
| D. | None of these |
| Answer» D. None of these | |
| 419. |
Material of construction of foundry crucible is _________________? |
| A. | Lead |
| B. | Stainless steel |
| C. | Graphite |
| D. | Cast iron |
| Answer» D. Cast iron | |
| 420. |
Main constituent of bone ash is____________________? |
| A. | Ammonium phosphate |
| B. | Calcium phosphate |
| C. | Animal charcoal |
| D. | Ammonium sulphate |
| Answer» C. Animal charcoal | |
| 421. |
Magnesium is present in___________________? |
| A. | Haemoglobin |
| B. | Chlorophyll |
| C. | Hypo solution |
| D. | None of these |
| Answer» C. Hypo solution | |
| 422. |
Machinability of hard alloys and tool steels is improved by_____________________? |
| A. | Spheroidising |
| B. | Annealing |
| C. | Tempering |
| D. | Normalising |
| Answer» C. Tempering | |
| 423. |
M10 index of coke indicates its____________________? |
| A. | Compressive strength |
| B. | Hardness |
| C. | Abrasion resistance |
| D. | Impact strength |
| Answer» D. Impact strength | |
| 424. |
LVDT used for displacement measurement is a/an _______________ Transducer? |
| A. | Passive |
| B. | Active |
| C. | Capacitive |
| D. | None of these |
| Answer» B. Active | |
| 425. |
Load cells used for the measurement of weight has______________? |
| A. | Compact & rugged construction with an accuracy of 0.1 to 1% |
| B. | No moving parts and incurs negligible deflection under load |
| C. | Provision of thermal compensation and is hermetically sealed |
| D. | All A, B & C |
| Answer» E. | |
| 426. |
Liquor poisoning generally occurs due to the presence of _______________ in it? |
| A. | Ethyl alcohol |
| B. | Impurities |
| C. | Methyl alcohol |
| D. | Carbonic acid |
| Answer» D. Carbonic acid | |
| 427. |
Liquid nitrogen containers can be made from ___________________? |
| A. | Ferritic stainless steel |
| B. | HSLA steel |
| C. | Titanium |
| D. | Austenitic stainless steel |
| Answer» C. Titanium | |
| 428. |
Limestone is added in the blast furnace (during pig iron manufacture) to______________________? |
| A. | Form slag by combining with impurities |
| B. | Supply heat by undergoing exothermic reaction with impurities |
| C. | Reduce the coke consumption |
| D. | Reduce slag viscosity |
| Answer» B. Supply heat by undergoing exothermic reaction with impurities | |
| 429. |
Limestone addition in the blast furnace is done to flux _______________ present in the raw materials? |
| A. | SiO2 |
| B. | Al2O3 |
| C. | MnO2 |
| D. | P |
| Answer» B. Al2O3 | |
| 430. |
Lead pencil contains____________________? |
| A. | Graphite |
| B. | Lead sulphide |
| C. | Lead |
| D. | Both B. & C. |
| Answer» B. Lead sulphide | |
| 431. |
Lead is poured into the joints between two ___________________ pipes? |
| A. | Cast iron |
| B. | Steel |
| C. | Concrete |
| D. | Plastic |
| Answer» B. Steel | |
| 432. |
Lead is poured into the joint between two ______________ pipes? |
| A. | Mild steel |
| B. | Concrete |
| C. | Cast iron |
| D. | Asbestos cement |
| Answer» D. Asbestos cement | |
| 433. |
Lead is poured into the joint between two _______________ pipes ? |
| A. | Mild steel |
| B. | Concrete |
| C. | Cast iron |
| D. | Asbestos cement |
| Answer» D. Asbestos cement | |
| 434. |
Lead is added to 60:40 brass primarily to improve_________________? |
| A. | Machinability |
| B. | Corrosion resistance |
| C. | Fluidity |
| D. | Strength |
| Answer» B. Corrosion resistance | |
| 435. |
L.D. (Linz-Donawitz) converter is used in the production of____________________? |
| A. | Copper |
| B. | Steel |
| C. | Zinc |
| D. | Aluminium |
| Answer» C. Zinc | |
| 436. |
Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which _____________ with increase in the pressure of steam? |
| A. | Decreases |
| B. | Increases |
| C. | Remain same |
| D. | May increase or decrease |
| Answer» B. Increases | |
| 437. |
Laser is a device to produce___________________? |
| A. | Gamma rays |
| B. | Microwaves |
| C. | A beam of white light |
| D. | A beam of coherent light |
| Answer» E. | |
| 438. |
Larger length & diameter water pipes are made by____________________? |
| A. | Electrical resistance welding |
| B. | Die casting |
| C. | Semi-centrifugal casting |
| D. | Continuous casting |
| Answer» D. Continuous casting | |
| 439. |
Large scale fire on fuel gas line is normally extinguished by________________? |
| A. | Water |
| B. | Steam |
| C. | Foam |
| D. | Nitrogen |
| Answer» E. | |
| 440. |
Large diameter reinforced cement concrete (RCC) pipes are generally joined by ____________________ joint ? |
| A. | Flanged iron |
| B. | Collar |
| C. | Flexible |
| D. | Expansion |
| Answer» C. Flexible | |
| 441. |
Joule-Thomson co-efficient is the ratio of________________? |
| A. | Pressure change to temperature change occuring during adiabatic compression of a gas |
| B. | Pressure change to temperature change occuring during adiabatic throttling of a gas |
| C. | Temperature change to pressure change occuring during adiabatic compression of a gas |
| D. | Temperature change to pressure change occuring during adiabatic throttling of a gas |
| Answer» E. | |
| 442. |
______________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently ? |
| A. | Collar |
| B. | Flanged |
| C. | Bell and Spigot |
| D. | Expansion |
| Answer» C. Bell and Spigot | |
| 443. |
Isotropic materials have the same _______________________ in all directions? |
| A. | Induced stresses |
| B. | Density |
| C. | Elastic properties |
| D. | Thermal properties |
| Answer» D. Thermal properties | |
| 444. |
__________________ is used for tying the steel columns to concrete foundation? |
| A. | Grouting |
| B. | Eyebolt |
| C. | Anchor bolts |
| D. | Refractory castables |
| Answer» D. Refractory castables | |
| 445. |
_______________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten ? |
| A. | Stellite |
| B. | High speed steel |
| C. | Cermet |
| D. | Alnico |
| Answer» B. High speed steel | |
| 446. |
____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ? |
| A. | Lancing |
| B. | Shot peening |
| C. | Slugging |
| D. | Spinning |
| Answer» C. Slugging | |
| 447. |
_____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ? |
| A. | Veneering |
| B. | Galvanising |
| C. | Electroplating |
| D. | Calorising |
| Answer» E. | |
| 448. |
_________________ is the most suitable lubricant for drawing mild steel wires? |
| A. | Kerosene |
| B. | Water |
| C. | Sodium stearate |
| D. | Lime water |
| Answer» D. Lime water | |
| 449. |
_______________ is the most important element, which controls the physical properties of steel ? |
| A. | Manganese |
| B. | Silicon |
| C. | Carbon |
| D. | Vanadium |
| Answer» D. Vanadium | |
| 450. |
_______________ is the hardest oxide and is hence used where high wear resistance at high temperature is required? |
| A. | Beryllium |
| B. | Zirconia |
| C. | Alumina |
| D. | Magnesia |
| Answer» D. Magnesia | |